curl --request POST \
  --url https://realtime.replace-me.example.com/meterreadings/summary/timeframe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "meterId": 1,
  "startDate": "2015-01-01T05:00:00.000+00:00",
  "endDate": "2020-07-31T04:00:00.000+00:00"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    meterId: 1,
    startDate: '2015-01-01T05:00:00.000+00:00',
    endDate: '2020-07-31T04:00:00.000+00:00'
  })
};

fetch('https://realtime.replace-me.example.com/meterreadings/summary/timeframe', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://realtime.replace-me.example.com/meterreadings/summary/timeframe"

payload = {
    "meterId": 1,
    "startDate": "2015-01-01T05:00:00.000+00:00",
    "endDate": "2020-07-31T04:00:00.000+00:00"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)